Lenze ETC Motion Control - Manual (Page 120)

CNC programming
G functions
G functions individual descriptions
3
3.2
3.2.2
l
120 EDSTCXN EN 2.0
3.2.2.28 G75 Scaling factor for input units
Setting the scaling factor of the individual axes for the programmed input
units.
G75 AXES
AXES Specification of the axis and the factor
G75 causes an extension or compression of the programmed profile before
processing by internal correction modules. This can be non−symmetrical if
different scaling factors are programmed for the individual axes. It must be
noted here that only the respective programmed target coordinates, center
coordinates and radius are scaled, i.e. circles remain unchanged as circles
and are never expanded into ellipses.
If a negative scaling factor is used, it is mirrored about the respective axis.
The programming of the function without the specification of axes sets all
the factors to "1" again.
G75 X2 Y−3 Scaling factor 2 for X and −3 for Y
G1 X10 Y5 Travel to X20 and Y−15
3.2.2.29 G76 Scaling factors for pulse evaluation
Setting the scaling factor for the pulse evaluation of the individual axes.
G76 AXES
AXES Specification of the axis and the factor
G76 can be used to change the pulse evaluation (pulses per distance) of the
axes. This corresponds to a linear transformation, as made necessary e.g. by
a change−over of the gearbox stage.
Like G75, G76 causes an extension or compression of the programmed
profile. However, in contrast to G75, the speeds and accelerations are also
effected. The max. allowed speeds and accelerations from the machine
constants are adjusted for this accordingly. The change to the pulse
evaluation means that the resulting profiles are different geometrically to
those programmed in the case of non−symmetrical scaling factors, e.g.
circles turn into ellipses and the speed on the path is not constant anymore.
If a negative scaling factor is used, it is mirrored about the respective axis.
The programming of the function without the specification of axes sets all
the factors to "1" again.
G76 C−1 Invert the movement direction of the C axis.
Syntax
Meaning of the addresses
Explanation
Example
Syntax
Meaning of the addresses
Explanation
Example